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Bioengineers are developing microchips, about the size of a thumb, that can behave like human organs. Donald Ingber, director of the Wyss Institute for Biologically Inspired Engineering, discusses how the "organ-on-a-chip" works and why the technology could replace the animal model for drug testing.

By referring to himself that way, police say, the suspect may have been implying he would mount an attack like the one in Colorado that left 12 people dead and 58 wounded. They found multiple weapons and thousands of rounds of ammunition at his home.

Curious about the history of currywurst? Searching for some facts about Spam? Unusual museums worldwide celebrate their favorite foods. And summer is a good time to check them out.

The International AIDS Conference isn't only about medical research. People from around the world met at its Global Village to share their experiences with the AIDS epidemic through music, art and dance. This year's highlights included a condom campaign and lube tasting booth.

The London Olympics' opening ceremony is a "show," director Danny Boyle says, that celebrates Britain, from the Industrial Revolution to its music and literature — even its socialized medicine. There's also time for thousands of athletes to enter Olympic Stadium. "We don't get lost in show business," Boyle says.

The Commerce Department's latest report confirms that economic growth was as lousy this spring as you suspected it was. Now the question is: Can anyone do anything to make it better in the year's second half? Next week, the Federal Reserve's policymakers may take another stab at it.

A proposed merger between EMI and Universal is drawing the scrutiny of regulators in the U.S. and Europe.

Film-director Danny Boyle is kicking off the Olympic games with a dazzling and very English opening show.

This has been a summer of blood, sweat and tears in Chicago. The city has been scorched by historic heat, and the homicide rate has soared. Chicago's gangs span generations, but today, they're more disorganized and disparate. Violence seems random, and police are outnumbered.

Many of the world's best marathoners come from a highland region where they run along mountainous dirt roads at 8,000 feet above sea level. They're competing for Olympic gold, but real gold inspires them, too.